In the past decades, sea ice ______ in the Ar...

In the past decades, sea ice ______ in the Arctic as a result of global warming.

A. had melted              B. has been melting        C. melted                    D. is melting

高二英语单项填空中等难度题查看答案及解析

Over the past decades, sea ice _____ in the Arctic as a result of global warming.

A. had decreased     B. decreased        C. has been decreasing D. is decreasing

高二英语单项填空中等难度题查看答案及解析

A new report says sea ice in the Arctic Ocean is melting more quickly than expected. American scientists say the ice is melting even faster than computer programs had estimated.

Scientists know that climate change has a major effect on the Arctic Ocean partly because sea ice is disappearing. They also know that areas of open seawater are expanding. Such areas are known to take in sunlight and increase temperatures. Scientists say this has helped to cause the loss of the Arctic’s ice cover.

For the study, the American scientists compared eighteen computer programs with observations made by satellites and other instruments. The Intergovernmental Panel on Climate Change used the computer programs to prepare its 2007 estimates of climate change.

The computer programs gave estimates of the amount of ice in the Arctic Ocean in the month of September. September is when the Arctic has the least ice, after the warm, summer months. The computer estimates suggested an ice loss of two and a half percent for every ten-year period between 1953 and 2006.

Newer studies of the Arctic have used information gathered by aircraft, satellites and ships. This information showed a loss of September ice cover of almost eight percent for every ten-year period between 1953 and last year. This means the ice is disappearing about thirty years faster than the computer programs estimated.

The scientists say the programs might not have recognized the full effect of increased carbon dioxide and other gases in Earth’s atmosphere. They say their study suggests the gases may have more of an effect than had been thought.

1.It is reported that sea ice in the Arctic Ocean is melting more quickly than expected mainly because _________.

A. climate change                        B. sea ice’s disappearance

C. seawater’s expansion              D. the loss of the Arctic’s ice cover

2. How did the scientists draw the conclusion that sea ice in the Arctic Ocean is melting more quickly than expected?

A. The scientists have been observing the Arctic Ocean for many years.

B. The scientists have compared the computer programs with observation made by satellites and other instruments.

C. The scientists have figured out many numbers with the help of computer.

D. The scientists have found that the seawater take in sunlight and increase temperatures.

3.If the ice melts at the present speed, by the end of this century the ice loss in the Arctic Ocean will be _________ according to newer studies.

A. 22.5%                B. 35%          C.72%         D. 100%

4.Which of the following is TRUE according to the passage?

A. The figures of the computer estimates are wrong.

B. Scientists study climate change through studying sea level.

C. Newer studies show gases may have more effect on sea ice in the Arctic Ocean.

D. The ice is melting even faster than satellites have estimated.

5.This report mainly warns human to _________.

A. prevent the sea ice in the Arctic Ocean from melting any more

B. pay more attention to the loss of the Arctic’s ice cover

C. take necessary steps to protect the environment of our earth

D. stop summer sea ice in the Arctic from disappearing so fast

高二英语阅读理解简单题查看答案及解析

Over the past decades, forest area ______ in China as a result of massive deforestation.

A. had decreased B. decreased        C. is decreasing    D. has been decreasing

高二英语单项填空简单题查看答案及解析

Due to climate change, Arctic ice is breaking up earlier in the spring, and its area is decreasing. This is creating problems for polar bears that make their homes off northern Alaska and in Hudson Bay.

Polar bears off Alaska normally hunt and raise their young on ice sheets that float on the ocean. But as the ice has melted, the polar bears have been forced to spend more time on land. There, they have begun to frequent beaches, feeding on the remains of whales caught by native hunters. For polar bears, this food is less nutritious than seals that they normally catch on ice sheets. The shrinking（减少） ice has also forced more polar bears into the ocean. In the past, they only had to swim short distances between ice sheets. But as the ice has shrunk, polar bears have been forced to swim longer and longer distances in the open ocean. This poses a severe danger during rough weather, and an increasing number of drowned polar bears have been observed.

In Hudson Bay, the ice breaks up three weeks earlier in the spring now than it did 20 years ago. Polar bears on Hudson Bay fast（绝食） during the summer, waiting for ice to form in the fall to hunt. Every year, the summer gets longer, and the bears get skinnier. Over the past 25 years, the average weight of the female bears has dropped 68 kg. This loss affects their ability to reproduce, and already the number of births has dropped 15 percent. Unless the bears can learn to survive these climate changes, these giants of the ice may one day disappear.

1.What is Arctic ice doing earlier each year?

2.What is true of polar bears that are spending more time on land in Alaska?

3.What do polar bears in Hudson Bay do during the summer?

4.In which publication would you most likely find this passage?

高二英语阅读理解中等难度题查看答案及解析

The number of snow geese arriving in the Arctic each spring to breed has risen over the past few decades. At first, wildlife biologists saw this as an environmental crisis, pointing to marshes（湿 地 ） where plants were eaten by the hungry birds. In response, the federal government loosened restrictions on snow goose hunting.

But how do the Inuit, in whose backyard this is taking place, view the situation? A recent plan is giving Inuit wildlife experts the opportunity to lend their knowledge to managing the species. The snow goose study, which is supported in part by Polar Knowledge Canada and led by the Kivalliq Wildlife Board (an Inuit organization that manages hunting, trapping and fishing in central Nunavut), asked the experts to share their generations of knowledge about snow geese and their views on what should be done.

“The community had concerns about controlling the　 population,” says Ron, a　 community officer of the Kivalliq Inuit Association, “and Inuit snow goose knowledge had never been recorded. People wanted to pass on what they knew.” Inuit experts disagreed with that, considering it wasteful and unnecessary. They felt hunting more snow geese in an organized way, such as paying local hunters a minimal amount of money and distributing the birds to disadvantaged families or operating a limited commercial hunt by employing local people, would be appropriate.

Inuit wildlife experts will plan to call on scientists this fall. They say they hope to search for a common way forward and that while there may be too many snow geese in some areas, it’s not a crisis. Biologists now generally agree that there seem to be plenty of undamaged marshes available and newer research shows that some damaged areas can recover.

“Now that we have recorded and documented Inuit knowledge of snow geese,” says Ron, “when facing the crisis other people will be able to use the information to help manage the species, which is fundamental to dealing with it effectively.”

1.Why did the federal government loosen limitations on snow goose hunting?

A. To make more profits. B. To create more marshes.

C. To wipe out the hungry birds. D. To protect the ecosystem.

2.Which of the following might Inuit wildlife experts agree with?

A. Organizing large commercial hunts.

B. Using snow goose hunting to man’s best advantage.

C. Regarding too many snow geese as a crisis.

D. Hunting as many snow geese as possible.

3.What might biologists think about the marshes’ future now?

A. It’s a bit promising. B. It’s unpredictable.

C. It’s too discouraging. D. It’s hard to get better.

4.What does the underlined word “it” in the last paragraph refer to?

A. The species. B. Inuit knowledge.

C. The crisis. D. Inuit research.

高二英语阅读理解困难题查看答案及解析

In the past two decades，the Chinese economy has undergone many reforms in an effort to compete more effectively on the international market.These reforms included allowing foreign banks to offer credit cards to Chinese citizens.Now，researchers at the University of Missouri (MU) have found about 30 percent of Chinese urban households now own at least one credit card and the growth rate of credit card adoption has been an average of 40 percent per year between 2004 and 2009.

Rui Yao，an assistant professor of personal financial planning at MU，says that this large growth in such a small amount of time has positive and negative implications for the Chinese economy.

''With more and more people taking advantage of credit cards in China，it certainly increases potential consumer buying　 power，''Yao said.'' However，we found that more than 90　 percent of credit card users were unaware of safety issues existing in credit card use and more than 60 percent had little knowledge of the consequences of credit card debt.This lack of knowledge could create problems as credit card ownership is expected to grow at a rate of 11 percent a year. ''

Yao found that while 72 percent of Chinese credit card　 holders were never late on their payment，only 55 percent were　 able to pay the full balance.She also found that 70 percent of Chinese credit card holders said that credit cards contributed to overspending.

Yao believes the Chinese could benefit from financial education designed to help them plan for their financial future and encouraging the Chinese to take advantage of debt in a responsible fashion is important for the Chinese economy. ''Appropriate use of debt can help households improve their quality of life as well as spur economic growth through an increase in market purchases'' Yao said.

1.Why did China allow foreign banks to offer credit cards to Chinese citizens?

A.To increase Chinese citizens’ confidence in economy.

B.To respond to the urgent demand for financial reforms.

C.To improve competitiveness in the international market.

D.To persuade more Chinese citizens to accept credit cards.

2.What is mainly talked about in Paragraph 3?

A.The potential market purchases in the future.

B.Weaknesses caused by lack of knowledge of credit cards.

C.The rapid growth in credit card ownership.

D.Advantages and disadvantages of using credit cards.

3.A lot of figures are used in the text in order to________.

A.record the valuable data B.provide concrete evidence

C.introduce a research method D.give a detailed description

4.The underlined word ''spur'' in the last paragraph is closest in meaning to ''________''.

A.control B.delay

C.promote D.discourage

高二英语阅读理解中等难度题查看答案及解析

. Great ____have been made in the field of computer science in the past decades.

高二英语单项填空简单题查看答案及解析

In the past few decades, scientists have made a great ________ in the treatment of cancer.

A. breakout　　 B. breakdown　　 C. breakup　　 D. breakthrough

高二英语单项填空中等难度题查看答案及解析

In the past decade, the use of social media has grown in a way that no one could have guessed. It has turned some teenagers into celebrities (名人) and turned the famous into the infamous, overnight.

A key feature of social media, however, is its volatility. Trends come and go, disappearing almost as quickly as they appeared. So, what were the key social media trends of 2018?

Short video apps such as TikTok and its Chinese equivalent Douyin, took the world by storm. The Telegraph reported that TikTok was ranked 8th on Apple’s App Store in April. And Douyin had more than 300 million domestic monthly active users in June, CNBC said.

Why are these short videos – which are rarely longer than a few minutes – so popular? Jiang Yige, Singapore-based analyst at FengHe Fund Management, has a theory. Short videos are “just right to fill in the little gaps in our busy schedules,” he told CNBC.

These videos – apart from being very convenient – are important to teenagers because they allow them to express themselves, according to Teen Vogue.

The sense of community that users of short video app get is another appealing feature. Liza Koshy, a user of the US app Musically who has over 2 million followers, said that she was thrilled when anyone said that her video had “inspired” them. “It’s really cool … because I think as social creators that’s what we all are,” she added.

Live streaming is another feature of our social media life that now seems as natural as sunrise. It’s a pretty neat idea: You can watch anyone, anywhere, live.

However, China has taken live streaming to a whole new level. In China, more than 100 million viewers monthly watch a live streaming video. Forbes thought that a number of factors had led to the popularity of live streams. Among them is viewers’ ability to interact while remaining anonymous.

However, the boom in social media may be having side effects too. Fake news is one serious problem it arguably causes. Material shared on these platforms is often not checked for accuracy. The most basic content can be false and can sway users one way or another. We use social media all the time; that doesn’t mean that we understand the influence it is having on us. We should be mindful of both the time we spend on it and its impact on our minds.

1.The underlined word “volatility” in Paragraph 2 possibly means “being _____”.

A.changeable B.steady

C.promising D.violent

2.According to Lisa Koshy, short videos are very popular because _____________.

A.they are very convenient

B.they help people kill time

C.they provide a sense of community

D.they allow people to express themselves

3.What can we learn about social media from the text?

A.The information from social media is highly reliable.

B.When it comes to social media, people know short videos the best.

C.People can’t communicate with each other without social media.

D.There is still much room for social media to make improvement.

4.What is the best title for the text?

A.Rapid Development of Social Media

B.Key Social Media Trends ruling 2018

C.Short Videos Taking the World by Storm

D.Live Streaming—New Feature of Social Media

高二英语阅读理解中等难度题查看答案及解析